Method of making constructional material



Patented Oct. 29, 1935 UNITED STATES PATENT OFFICE METHOD OF MAKINGCONSTRUCTIONAL MATERIAL Albert C. Fischer, Chicago, 111., assignor toThe Philip Carey Manufacturing Company, a-corporation of Ohio 4 Claims.

This application is a division of my application Serial No. 62,907,which matured into Patent No. 1,694,212, December 4, 1928.

The material herein described is suitable for 5 use as a protectioncourse between construction elements and is a substitute for built-upmembrane waterproofing. This material in still thicker dimensions isadapted for use as planking, as a waterproof board for purposes such asrail filler, blocked brick, crossings, industrial flooring, roofdecking, sidewalk covering, waterproofing slabs, waterproofing cushionbetween paving elements, and stair treads, in fact any constructionalmaterial which can be extruded or rolled in strips which are relativelythick as distinguished from such sheet material as saturated felt orcomposition roofing. This invention relates chiefly to strips and blocksrelatively thick, which blocks may reach 2 to 3 inches in thickness.

By building up a structure of this material and incorporating same in amass of ductile substance, a laminated form can be created, so that themass when rolled in sheets has the appearance of a shale-like formationcontaining repeat-- ed layers of strip-like particles which spreadthemselves over small areas of the ductile substance, lending strengththereto.

My invention relates particularly to the utilization of raw materialswhich enable one to prepare this mass at a very small cost by using rawmaterials which now constitute waste, and other materials which are lefton the ground to rot or are used as fuel.

I am particularly referring to corn husks, which may be cut in smallsections or strips, say x 2" in length, or any convenient size, so thatthe dried corn husk or shreaded pieces of corn husk will act as astrengthening means to a ductile mass, over which it may be laid or inwhich it may be incorporated. In'this mixture may be other subdividedfibrous material, or the husks may be incorporated in a green state inthe mass, or may be incorporated in a dried state. Care must beexercised that the ductile material is not too hot,

in order not to char the husk material. This necessitates heating to atemperature, or incorporating the husks at a temperature which will notchar the vegetable matter. An elastic substance may also be used whichbecomes ductile at warmer temperatures, permitting the materials citedto be incorporated therein.

A suitable formula for preparing this mass before rolling into a flatsheet is that of 30 per cent husk material and '70 per cent ductilematerial.

Another formula is that of 20 per cent husk material, 10 per centsubdivided fibrous material and '70 per cent ductile material. Thismaterial may be either extruded into flat sheet form or it may bepressed between suitable rolls into fiat sheet form, or may be drawnbetween belts 5 to a fiat sheet form. The structure of the mass would bedifferent under the three operations. By extruding the mass a generalmixture would be obtained, flat husk-like particles spreading in' everydirection. Likewise the fibrous matter 10 spreading in every direction.

If drawn between rolls with belts, the mass would straighten itself outinto fiat laminated layers caused by the inflow of the ductile substancebetween belts. Likewise the fibrous mat- 15 ter would have a tendency tostraighten itself out, causing a flow of the fibrous matter-and theflake-like particles in a longitudinal direction.

This laminated structure so created is a desirable feature, as itincreases the area of fiat 20 surface which the flat husk particles comein contact with, thus adding strength to that ductile mass or the areaof such mass with which the flat husk particles come in contact.

When pressed between rolls without belts, the 25 formation is prettymuch the same as obtained by pressing the mass between'rolls with belts.All three forms of mechanical devices are on the market, so that it isnot necessary to describe in detail the machinery as extrusion machines,30 pressing rolls and belted rolls are easily obtainable.

The invention and art involved are in the use of the materials in theirparticular shape and in the results obtained by the use of the respec-35 tive classes of machinery. To my knowledge there is no product on themarket in which the result is obtained that is obtained by this mixture,and therefore I claim as original and new, constructional material asdescribed above. 40

I claim:

1. The method of making compressible and expansible strips characterizedby mixing a mass of ductile waterproofing binder, vegetable reenforcingelements of relatively large surface areas, 45 and finely dividedfibers; and forming the mass into a sheet between belts.

2. The method of making compressible and expansible joints characterizedby mixing a mass of ductile waterproofing binder, vegetable reen- 50forcing elements of relatively large surface areas, and finely dividedfibers; and feeding same between moving belts to form a strip in whichthe vegetable elements are arranged in a longitudinal direction. 55

3. The method of making reenforced constructional material comprisingmixing a. mass of ductile waterproofing binder and reenforcing elementsof relatively long length, and forming the 5 mass into sheets with thereenforcing elements disposed in a longitudinal direction.

4. The method of making reenforced construc- ALBERT. C. FISCHER.

